Improved burglar-alarm



HORACE WICKHAM, JR., OF CHICAGO, ILLINOIS.

IMPRovED Boersma-ALARM.

Specification forming part of Letters Patent No. 55,754, dated June 19, 1866.

E shows the plates which support the gearing of the alarm, constructed in the usual manner. These plates may be secured to the inside of the box by means of' screws or otherwise, as most convenient,onlyso thatthe alarm is held securely in the box.

F represents the standard passing through the bottom of the box A, used for f lischarging the clock-alarm.

t shows an elliptical opening' made in the upper part ot' the standard F in order that the point s ot' the support u may pass into it and steady the standard when operating the alarm.

G shows the cap attached to the standard F, which is used to lock against the arm H and keep the clock-alarm from operating when desired.

I represents the common thumb-screw used both in holding the plate G against the arm H and discharging the alarm.

Operation: 7a shows the post on which the keyis put when winding up the alarm. In order that the alarm may be given only when required, the screw I must be turned against the box, so as to prevent the plate G from passing above the arm H, in which position the box can be carried without giving an alarm. In setting' the alarm the screw I must be turned required alarm when the window or door is down, as shown by the dotted lines J, and the opened. box must be set so that when the dooror win- Another important feature ot' my invention dow is opened they will strike against the screw is that it can be conveniently carried in acom- I J, as shown at Fig. 2, and the alarm will be mon trunk or carpet-sack and applied without given. disgnring the casings of doors or windows. Having thus fully described my device, what To enable others skilled in the art to make I claim, and desire to secure by Letters Patand use myinvention,lwilldescribethemethod ent ot' the United States, is` ot' construction and operation. The operating' ot the clock-alarm by means A represents the sides, ends, and bottom of ofthe arm H ,support U, standard F, and screw the box which ineloses the alarm. A is the I, when constructed substantially as set forth top of the box, which may be hung to the sides and operated as described.

To all whom t may concern:

Be it known that I, HORACE WIGKHAM, Jr., of Chica-go, in the county of Cook and State ot Illinois, have invented an Improved Burglar-Alarm; and I do hereby declare that the following is a full, clear, and exact description ings and letters otret'erenee marked thereon,

Figure l is a plan view of my burglar-alarm. Fig. 2 is a longitudinal elevation ofthe same, with the side of the box removed so as to show the gearing inside.

The object of my invention is to provide a convenient device that can be carried by any person when traveling and applied to a door or window, so as to give an alarm when the door or window is opened from the outside of the room, and thus give warning to the oecu` pant of the approach of danger.

The construction and application ofmy alarm are ditferent from any heretofore introduced from the tact that it is not necessary that it should be attached permanently or temporarily tothe casings of doors or windows, butcan be set either on the tloor, nea-r the door, or on a window-sill in such a position as to give the by means of hinges and secured by a hookand HORACE WICKHAM, Ju.. staple, if desired. A' is the bell, B the ham- Witnesses: mer-lever, I) the gearing, and C the spring, of ROBERT S. BILAW,

the common clock-alarm. J. L. MERIAM. 

